package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealOverViewVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {


    @Autowired
    private SetmealMapper setmealMapper;


    @Autowired
    private SetmealDishMapper setmealDishMapper;


    /**
     * 新增套餐
     *
     * @param setmealDTO
     * @return
     */
    @Override
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //套餐表添加
        setmealMapper.save(setmeal);

        //返回主键
        Long id = setmeal.getId();
        //批量保存套餐和菜品的关联关系
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(s -> s.setSetmealId(id));
        setmealDishMapper.save(setmealDishes);

    }

    /**
     * 查询套餐
     *
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> setmealVO = setmealMapper.select(setmealPageQueryDTO);
        return new PageResult(setmealVO.getTotal(), setmealVO.getResult());
    }




    /**
     * 批量删除套餐
     *
     * @param ids
     */
    @Override
    public void delete(List<Integer> ids) {
        //起售中的套餐不能删除
        ids.forEach(s -> {
            Setmeal setmeal = setmealMapper.sataus(s);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });

        //删除套餐表中的数据
        ids.forEach(setmealId -> {
            setmealMapper.deleteBId(setmealId);

            //删除套餐菜品关系表中的数据
            setmealDishMapper.delete(setmealId);
        });

    }

    /**
     * 根据id查询套餐
     *
     * @param id
     * @return
     */
    @Override
    public SetmealVO getById(Long id) {
        SetmealVO setmealVO = setmealMapper.getByIdWithDish(id);
        return setmealVO;
    }

    /**
     * 修改套餐
     *
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //1、修改套餐表，执行update
        setmealMapper.update(setmeal);

        //套餐id
        Long setmealDTOId = setmealDTO.getId();

        //2、删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
        setmealDishMapper.deleteBySetmealId(setmealDTOId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(s -> {
            s.setSetmealId(setmealDTOId);
            //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
            setmealDishMapper.save(setmealDishes);

        });
    }


    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);

}
}
